Malicious PDF — malware analysis report

Static analysis result for SHA-256 8274b0005cdf04e4…

MALICIOUS

PDF

41.6 KB Created: 2020-09-12 06:25:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45ba045d11576693fc73147178199e63 SHA-1: f0444c0a532b8944c942c6845d210c848a554c6e SHA-256: 8274b0005cdf04e46d2f626e7b4eeb091196756332e9c310aa9891be997cc4d9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, with one specifically identified as a malicious redirector leading to a lure for 'Avira antivirus 2018 offline'. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates an advance-fee fraud, likely involving fake software or prizes. The presence of many external PDF links suggests a link farm designed to distribute malicious content or engage in SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.club/wix?keyword=avira+antivirus+2018+offline
    • http://vubaxusud.iowaschoolsafety.org/uploads/1/3/2/8/132815001/2826790.pdf
    • http://files.avalonweb.com/uploads/1/3/0/9/130969761/tigusemenene.pdf
    • http://dusel.stpaulsliverpool.org/uploads/1/3/0/7/130740069/legirigejevuwojefufa.pdf
    • http://files.noelandjackiesjourneys.com/uploads/1/3/2/6/132696128/143318.pdf
    • http://veroxa.ernst-arch.com/uploads/1/3/0/7/130776132/b881083659.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/ec0c41_14946a610a824bfcb91e74596fc9d712.pdf
    • https://static.usrfiles.com/ugd/ecec20_c6933a0b821d474492106c70bb5696f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd3659b497844cf6a7dd355e08143771.pdf
    • https://cdn.shopify.com/s/files/1/0432/6424/5925/files/the_walking_dead_s07e02_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7610/files/96607623633.pdf
    • https://cdn.shopify.com/s/files/1/0428/8249/8716/files/fofomifexovabad.pdf
    • https://cdn.shopify.com/s/files/1/0436/5074/4478/files/nufixexafexokuzokeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/2699/7663/files/examen_formacion_civica_y_etica_1_secundaria.pdf
    • https://cdn.shopify.com/s/files/1/0450/3106/3716/files/balada_para_adelina_partitura_piano.pdf
    • https://cdn.shopify.com/s/files/1/0434/5331/7272/files/3123014134.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006486.bin
5d66a6a55dd91ef5330302249bdad5dc789fd16a4657cc03cadb81b12b9726b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6486 5332 bytes
font_01_sfnt_off000076bd.bin
d0ad6885f909264849dadd4c8b87f4985b919119d48217bacf04bc6c7b69b4e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76BD 10164 bytes

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